SOLUTION: What integer is closest to the area of a triangle whose sides are 5, 6, and 7 units?

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Question 427981: What integer is closest to the area of a triangle whose sides are 5, 6, and 7 units?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Using Heron's formula, the semiperimeter is equal to 9, and the area is

A+=+sqrt%28%289%29%289-5%29%289-6%29%289-7%29%29+=+sqrt%28216%29. This is roughly 14.697, so the integer closest to the area is 15.